Re: [Boost-users] [Regex] Group of number at line end

Subject: Re: [Boost-users] [Regex] Group of number at line end
From: Roland Bock (rbock_at_[hidden])
Date: 2009-09-24 10:55:10

Reiner Hutsch wrote:
> -----Ursprüngliche Nachricht-----
> Von: boost-users-bounces_at_[hidden]
> [mailto:boost-users-bounces_at_[hidden]] Im Auftrag von John Maddock
> Gesendet: Mittwoch, 23. September 2009 18:45
> An: boost-users_at_[hidden]
> Betreff: Re: [Boost-users] [Regex] Group of number at line end
> 
>> i am looking for a regular expression which extracts a group of number 
>> from
>> the end of a line like the following:
>>
>> "This line may contain digits (9) but ends with numbers like 1 2 3 4 5"
>>
>> When using a regex like "^(.+)(\\s+(\\d+))+$" I receive
>> "This line may contain digits (9) but ends with numbers like 1 2 3 4" and
>> "5".
>>
>> Can someone help me?
> 
> What about:  "^(.+)[^\\d\\s](\\s+\\d+)+$"
> 
> HTH, John. 
> 
> Hi John,
> 
> sorry, but this gives also only the last number.
> 
> Reiner.

If you want the group, not the each number separately, this should work:

^.*[^ 0-9] *([ 0-9]+)$

Testing with perl:
perl -e '$x = "This line may contain digits (9) but ends with numbers 
like 1 2 3 4 5"; $x =~ s/^.*[^ 0-9] *([ 0-9]+)$/$1/g; print "$x\n";'

Output:
1 2 3 4 5

Regards,

Roland